linux-kernel - [PATCH v4 7/9] usb: cdns3-ti: add J7200 support with reset-on-resume behavior

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Date: Thu, 07 Mar 2024 10:55:08 +0100
From: Théo Lebrun <theo.lebrun@...tlin.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Rob Herring <robh+dt@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, Roger Quadros <rogerq@...nel.org>, 
 Peter Chen <peter.chen@...nel.org>, Pawel Laszczak <pawell@...ence.com>, 
 Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>, 
 Tero Kristo <kristo@...nel.org>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 Grégory Clement <gregory.clement@...tlin.com>, 
 Kevin Hilman <khilman@...nel.org>, Alan Stern <stern@...land.harvard.edu>, 
 linux-usb@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 Théo Lebrun <theo.lebrun@...tlin.com>
Subject: [PATCH v4 7/9] usb: cdns3-ti: add J7200 support with
 reset-on-resume behavior

Add ti,j7200-usb compatible. Match data indicates the controller resets
on resume meaning:
 - The cdns3-ti wrapper init sequence must be ran at resume.
 - Tell the cdns3 core that we reset on resume. This silences a xHCI
   warning visible in cases of unexpected resets.

Signed-off-by: Théo Lebrun <theo.lebrun@...tlin.com>
---
 drivers/usb/cdns3/cdns3-ti.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/usb/cdns3/cdns3-ti.c b/drivers/usb/cdns3/cdns3-ti.c
index 29fb24c811b3..648243a27987 100644
--- a/drivers/usb/cdns3/cdns3-ti.c
+++ b/drivers/usb/cdns3/cdns3-ti.c
@@ -17,6 +17,8 @@
 #include <linux/pm_runtime.h>
 #include <linux/property.h>
 
+#include "core.h"
+
 /* USB Wrapper register offsets */
 #define USBSS_PID		0x0
 #define	USBSS_W1		0x4
@@ -255,7 +257,25 @@ static const struct dev_pm_ops cdns_ti_pm_ops = {
 	SYSTEM_SLEEP_PM_OPS(cdns_ti_suspend, cdns_ti_resume)
 };
 
+static struct cdns3_platform_data cdns_ti_j7200_pdata = {
+       .quirks = CDNS3_RESET_ON_RESUME,
+};
+
+static const struct of_dev_auxdata cdns_ti_j7200_auxdata[] = {
+       {
+               .compatible = "cdns,usb3",
+               .platform_data = &cdns_ti_j7200_pdata,
+       },
+       {},
+};
+
+static const struct cdns_ti_match_data cdns_ti_j7200_match_data = {
+       .reset_on_resume = true,
+       .auxdata = cdns_ti_j7200_auxdata,
+};
+
 static const struct of_device_id cdns_ti_of_match[] = {
+	{ .compatible = "ti,j7200-usb", .data = &cdns_ti_j7200_match_data, },
 	{ .compatible = "ti,j721e-usb", },
 	{ .compatible = "ti,am64-usb", },
 	{},

-- 
2.44.0